山东是电缆桥架的生产大省，聊城、济南、潍坊等地聚集了大量厂家，从镀锌、不锈钢到锌铝镁、玻璃钢，品类多到让人挑花眼。但“山东产”不等于“随便买”，选错型号、装错环节，轻则返工，重则留下安全隐患。这篇文章把选型、安装、验收的核心干货一次讲清。

Shandong is a major province for the production of cable trays. Liaocheng, Jinan, Weifang and other places have gathered a large number of manufacturers, ranging from galvanized and stainless steel to zinc aluminum magnesium and fiberglass, with a wide variety of products that are eye-catching. But 'Made in Shandong' does not mean 'buying casually'. Choosing the wrong model or installing the wrong link can result in rework at the slightest, and leaving safety hazards at the heaviest. This article explains the core essentials of selection, installation, and acceptance in one go.

先看环境，再定材质。这是选桥架的第一原则。需要屏蔽电气干扰或防护腐蚀性液体、易燃粉尘的电缆网络，应选用槽式复合型防腐屏蔽桥架（带盖）。强腐蚀性环境建议采用复合环氧树脂防腐阻燃型，托臂和支架也要用同种材料，否则桥架没坏、支架先烂。大跨距（大于3米）场合要选复合型桥架，户外场景同样推荐复合环氧树脂材质。如果预算允许且追求长寿命，锌铝镁材料近年热度上升，耐腐蚀和防火表现优于传统镀锌，但要注意认准有资质厂家的真实检测报告，别被概念炒作了。

First look at the environment, then determine the material. This is the first principle for selecting cable trays. Cable networks that require shielding against electrical interference or protection against corrosive liquids and flammable dust should use trough type composite anti-corrosion shielding cable trays (with covers). Composite epoxy resin anti-corrosion and flame-retardant type must be used in highly corrosive environments, and the same material must be used for the support arm and bracket, otherwise the bridge frame will not be damaged and the bracket will rot first. Composite cable trays should be selected for large-span (greater than 3 meters) occasions, and composite epoxy resin materials are also recommended for outdoor scenes. If the budget allows and the pursuit of long life is pursued, the popularity of zinc aluminum magnesium materials has increased in recent years, and their corrosion resistance and fire resistance are better than traditional galvanizing. However, it is important to pay attention to the real testing reports of qualified manufacturers and not be hyped up by concepts.

安装环节，几个数字建议盯死。户内支吊架间距一般控制在1.5至3米，户外立柱中跨距通常为6米。金属桥架直线段每隔50米建议预留20至30毫米的伸缩缝，这是很多施工队容易漏掉的细节，夏天一膨胀，桥架就“顶牛”变形了。水平安装的支架高低偏差和左右偏差都不应大于10毫米，横平竖直不是好看，是电缆敷设不受伤的前提。还有一条硬规矩：轻型墙体禁止采用膨胀螺栓固定，别问为什么，问就是见过掉下来的。

During the installation process, several numbers must be closely monitored. The spacing between indoor supports and hangers is generally controlled at 1.5 to 3 meters, and the span of outdoor columns is usually 6 meters. The straight section of the metal bridge must reserve expansion joints of 20 to 30 millimeters every 50 meters, which is a detail that many construction teams are prone to miss. In summer, when the bridge expands, it becomes deformed. The height deviation and left-right deviation of the horizontally installed bracket should not exceed 10 millimeters. Horizontal and vertical alignment is not aesthetically pleasing and is a prerequisite for cable laying without injury. There is another hard rule: it is forbidden to use expansion bolts to fix lightweight walls. Don't ask why, you have seen them fall off before.

桥架系统建议可靠接地。金属桥架不是摆设，它是电气安全的一部分。桥架端部之间的连接电阻应不大于0.00033欧姆，接地孔要清除绝缘涂层。每个接头处非常好用镀锡铜带跨接，每隔20至30米增设一个接地连接点，起始端和终点端都得接地。振动场所的接地连接处要加装弹簧圈，防止松动。

The bridge system must be reliably grounded. Metal cable trays are not decorations, they are part of electrical safety. The connection resistance between the ends of the bridge should not exceed 0.00033 ohms, and the insulation coating should be removed from the grounding hole. It is best to use tin plated copper tape to cross each joint, and add a grounding connection point every 20 to 30 meters. Both the starting and ending ends must be grounded. A spring coil should be installed at the grounding connection of the vibration site to prevent loosening.

山东桥架供应链成熟，济南、聊城、潍坊都有成规模的厂家和集采项目在跑。但供应链优势不该成为偷工减料的理由。选型看环境，安装守规范，验收查细节——这三步做到位，桥架才真正对得起“山东制造”这块招牌。

The supply chain of cable trays in Shandong is mature, with large-scale manufacturers and centralized procurement projects running in Jinan, Liaocheng, and Weifang. But supply chain advantages should not be a reason for cutting corners. Selection depends on the environment, installation follows standards, and acceptance checks details - only by doing these three steps well can the bridge truly live up to the label of "Made in Shandong".

本文由山东电缆桥架友情奉献.更多有关的知识请点击:http://www.sdhangfeng.com我们将会对您提出的疑问进行详细的解答，欢迎您登录网站留言.

This article is a friendly contribution from Shandong Cable Bridge For more information, please click: http://www.sdhangfeng.com We will provide detailed answers to your questions. You are welcome to log in to our website and leave a message